Alert archive / Illinois / Wind Chill Warnings in 2014

Wind Chill Warning 1, NWS Chicago, IL

January 4, 201416 counties in Illinois; 5 counties in Indiana

NWS Chicago, IL issued this wind chill warning at Jan 4, 2014, 2:07 PM CST for 16 counties in Illinois; 5 counties in Indiana. It took effect at Jan 5, 2014, 6:00 PM CST. It was in force for 42 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 4, 2014, 2:07 PM CST (20:07 UTC)
In effect from: Jan 5, 2014, 6:00 PM CST
Expired: Jan 7, 2014, 12:00 PM CST
In force: 42 hr
Issued by: NWS Chicago, IL

All 21 counties

Boone County, IL, DeKalb County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, McHenry County, IL, Ogle County, IL, Winnebago County, IL, Benton County, IN, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 15 km from the middle of the area, began a volume at 20:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.1 hours before the alert went out and 156 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1481 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 565 m²/s²
0-3 km storm-relative helicity: 826 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind chill warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Chicago, IL wrote its last area forecast discussion before this wind chill warning went out at Jan 4, 1:53 PM CST, 14 minutes earlier.

Area forecast discussion, Jan 4, 1:53 PM CST, 14 minutes before

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Hazardous weather outlook, Jan 4, 1:04 PM CST, 1 hour 3 minutes before

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In the hours before

Local storm report, Jan 4, 12:28 PM CST, 1 hour 39 minutes before

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The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 4, 3:57 AM CST	Winter Storm Warning	LOT	DeKalb, DuPage, Ford, Grundy, Iroquois, Kane and 6 more	44 hr
Jan 4, 3:57 AM CST	Winter Weather Advisory	LOT	DuPage, Grundy, Kendall, LaSalle	7 hr
Jan 4, 9:22 AM CST	Small Craft Advisory	LOT		6 hr
Jan 4, 10:46 AM CST	Winter Weather Advisory	LOT	Boone, McHenry, Ogle, Winnebago	24 hr
Jan 4, 3:09 PM CST	Gale Watch	LOT		12 hr
Jan 4, 3:09 PM CST	Small Craft Advisory	LOT		24 hr
Jan 4, 3:09 PM CST	Heavy Freezing Spray Watch	LOT		6 hr

Nearby

Wind Chill Warnings in Illinois, 2014 Wind Chill Warnings in Indiana, 2014 Every wind chill warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.